Effect of random phase error and baseline roll angle error on eddy identification by interferometric imaging altimeter

Le GAO; Hanwei SUN; Jifeng QI; Qiufu JIANG

doi:10.1007/s00343-020-0044-3

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Effect of random phase error and baseline roll angle error on eddy identification by interferometric imaging altimeter

Physics | Updated：2023-05-19

- Effect of random phase error and baseline roll angle error on eddy identification by interferometric imaging altimeter
- Effect of random phase error and baseline roll angle error on eddy identification by interferometric imaging altimeter
- 海洋湖沼学报（英文） 2022年40卷第5期页码：1881-1888
- Affiliations：
  
  1.CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences and Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
  2.Beijing Radio Measurement Institute, Beijing 100854, China
  3.Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
- Author bio：
  
  Hanwei SUN,sunhw12@tsinghua.org.cn
- Funds：
  
  the Ministry of Science and Technology of China(2016YFC1401008);the Key R & D Program of Shandong Province, China(2019GHY112055);the National Natural Science Foundation of China(U2006211);the Major Program of National Natural Science Foundation of China(42090044);the National Natural Science Foundation for Young Scientists of China(41606200);the National Natural Science Foundation for Young Scientists of China(41776183);the National Natural Science Foundation for Young Scientists of China(41906157);the Key Project of Center for Ocean Mega-Science, Chinese Academy of Sciences(2019JZZY010102);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA19060101);the Strategic Priority Research Program of Chinese Academy of Sciences(XDB42000000);the Key Project of Center for Ocean Mega-Science, Chinese Academy of Sciences(COMS2019R02);the CAS Program(Y9KY04101L);the Marine S & T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)(2018SDKJ0102-2);the Fundamental Research Funds for the Central Universities (Hohai University)(2018B41814);© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2022
- DOI：10.1007/s00343-020-0044-3
  中图分类号：
- 收稿：2020-01-22，
  
  录用：2020-3-22，
  
  网络首发：2020-04-26，
  
  纸质出版：2022-09
- Accepted：
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Effect of random phase error and baseline roll angle error on eddy identification by interferometric imaging altimeter[J]. 海洋湖沼学报（英文）, 2022,40(5):1881-1888.

Le GAO, Hanwei SUN, Jifeng QI, et al. Effect of random phase error and baseline roll angle error on eddy identification by interferometric imaging altimeter[J]. Journal of Oceanology and Limnology, 2022, 40(5): 1881-1888.
Effect of random phase error and baseline roll angle error on eddy identification by interferometric imaging altimeter[J]. 海洋湖沼学报（英文）, 2022,40(5):1881-1888. DOI： 10.1007/s00343-020-0044-3.

Le GAO, Hanwei SUN, Jifeng QI, et al. Effect of random phase error and baseline roll angle error on eddy identification by interferometric imaging altimeter[J]. Journal of Oceanology and Limnology, 2022, 40(5): 1881-1888. DOI： 10.1007/s00343-020-0044-3.

摘要

Abstract

To achieve better observation for sea surface

a new generation of wide-swath interferometric altimeter satellites is proposed. Before satellite launch

it is particularly important to study the data processing methods and carry out the detailed error analysis of ocean satellites

because it is directly related to the ultimate ability of satellites to capture ocean information. For this purpose

ocean eddies are considered a specific case of ocean signals

and it can cause significant changes in sea surface elevation. It is suitable for theoretical simulation of the sea surface and systematic simulation of the altimeter. We analyzed the impacts of random error and baseline error on the sea surface and ocean signals and proposed a combined strategy of low-pass filtering

empirical orthogonal function (EOF) decomposition

and linear fitting to remove the errors. Through this strategy

sea surface anomalies caused by errors were considerably improved

and the capability of satellite for capturing ocean information was enhanced. Notably

we found that the baseline error in sea surface height data was likely to cause inaccuracy in eddy boundary detection

as well as false eddy detection. These abnormalities could be prevented for "clean" sea surface height after the errors removal.

关键词

Keywords

references

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